Cylinder head



G. D. ANGLE CYLINDER HEAD Nov. 27, 1951 2 SHEETS-SHEET 1 Filed Oct. 23, 1946 INVENTOR GzenmpA G. D. ANGLE CYLINDER HEAD Nov. 27, 1951 Filed Oct. 23, 1946 .LE Z.

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!NVENTOR Gleam 1?. Angle ATTORNEYS symmetrically placed tappet-engaging surfaces i9-20 to the actuator mechanism (not shown) for the valves l1l8.

Further in accordance with the above-indicated principles of symmetry about a central axis 10, dual spark-plug-receiving apertures l920 may be provided at diametrically opposed loca tions. Also, pairs of stud-receiving bores 2l'22 and 23-24 may be located opposite each other and symmetrically about the axis l0. In addition the cooling fins 6 about the two port systems are preferably diametrically symmetrical about the same axis of symmetry,.so that, regardless of the port used for exhaust purposes, cooling efflciency mav be the same.

It will be seen that with the arrangement described, the cylinder head may be affixed to a cylinder block as by passing the studs 9 into the cylinder block and by receiving studs or other bolt means through the bores 2|, 22, 23, 24. In this position the valve port I! may be connected say to the inlet manifold system of an engine, and the valve guide l3 may receive a valve I! positioned for control by an inlet valve-actuating mechanism or tappet (not shown). Similarly, the valve port !2 may be connected to the exhaust manifold system for the engine, while a valve 18 supported in the guide means [4 may be actuated by an exhaust-valve-actuating mechanism; After prolonged use of the engine with the head 5 bolted in the manner described, the seat l6 or other parts of the exhaust-valve system may become excessively worn. In order materially to increase the life of the cylinderhead, it may be replaced upon its cylinder block in a 180-degree reversed orientation. After such relocation of the head 5 with respect to itscylinder block, it will be clear that valves "and 18 (supported in guide means l3 and M) will still be suitably positioned for cooperation with the valve-actuating means of the engine but that the port I2 would then serve as an inlet and the port I l as an exhaust. It will be noted that, even though the exhaust function is carried out in .the opposite port (after reversal), the symmetrical arrangement of the fins 6 (as shown) makes possible the same cooling efiiciency as obtained before reversed mounting of the head.

It will be appreciated that I have described a relatively. simple cylinder-head construction which may materially extend the service customarily expected of a cylinder head. This increase in life is obtained with a construction that is inherently no more costly than present arrangements. The maintenance operation required to extend the life of the cylinder head is clearlyof the simplest sort, there being no need in any way to alter either of the manifold systems of the engine or either of the valve-actuating mechanisms.

While I have described my invention in detail for the preferred form shown, it will be understood that modifications may be made within the scope of the invention as defined in the claims which follow,

Iclaim:

1. In a removably attachable cylinder head for a valve-in-head engine, a head block including a substantially flat bottomsurface sealingly to be applied to a cylinder block, two planes of symmetry substantially normal to said bottom surface, said head block having two substantially alike independent manifolding duct systems having openings to both sides of said planes of symmetry, one of said duct systems being disposed symmetrically with respect to the other of said other of said duct systems may be performed by form generally symmetrical about each of two planes of symmetry intersecting to define a central axis of symmetry, two substantially alike valve-receiving means disposed diametrically symmetrically about said central axis, valve-port means associated with each of said valve-receiving means and disposed diametrically symmetrically about said central axis, cooling means for each of said valve-port means and diametrically symmetrically disposed about said axis, and securing means for holding said head on a cylinder block, said securing means being disposed diametrically symmetrically about said axis, whereby for one secured position of said head on a cylinder block an intake valve may be operated in one of said valve-receiving means and an exhaust valve may be operated in the other of said valve-receiving means, and whereby for an oppositely secured position of said head on said cylinder block an intake valve may be operated in said other valvereceiving means and an exhaust valve may be operated in said one valve-receiving means, and further whereby the cooling efliciency of said head may be the same in both the possible orientations of said head.

3. A cylinder head according to claim 2, in which said securing means comprises pairs of diametrica1ly opposed bolt-receiving bores through said block.

4. A cylinder head according to claim 2, in which said block has a pair of spark-plug receiving apertures diametrically opposed across said central axis.

GLENN D. ANGLE.

REFERENCES CITED Thefollowing references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,012,635 Harmer Dec. 26, 1911 1,867,795 Angle July 19, 1932 1,910,591 Chilton May 23, 1933 2,012,740 Brown Aug. 27, 1935 2,016,680 Meyer Oct. 8,- 1935 2,066,722 Edwards Jan. 5, "1937 2,132,605 Chilton Oct. 11, 1938 2,225,102 Daub Dec. 17, 1940 2,280,660 Newcomb Apr. 21, 1942 2,293,412 Steiner et al Aug. 18, 1942 2,362,622 Fisher Nov. 14, 1944 2,401,210 Willgoos May 28, 1946 FOREIGN PATENTS Number Country I Date 113,074 Great Britain of 1917 

